I believe the 4 piece T15 gives a +5% critical chance on Pyroblast. Not a guaranteed critical though. With the buff in stats you get from the 2 T16 pieces you get almost +2% critical strike overall, meaning you get more HU proc chance, more Pyroblasts, more damage. Isn't it correct? All you people that say that you change 4 piece bonus set T15 only for 4 piece T16, do you have any sims to prove it(I speak for fire only)?